Semi-automatic revolving lathe with several mandrels.



M. H. BLANGKE'. SEMI-AUTOMATIC REVOLVING LATHE WITH SEVERAL MAITDRELS.

APPLICATION FILED OCT. 29, 1907 Paiented Sept. 29,1908.

4 SHEETS-SHEET 1..

4 v M. Hi BLANGKE. -SEMLAUTOMATIG'RBVOLVING LATHE WITH gEVERAL MANDRELS.

AYI'LIUATION FILED 001'. 29, 1907 4'SHBETS-SHEET 2- M. H. BLANGK-E. 4 SEMI-AUTOMATIC REVOLVING LATHE WITH SEVERAL MANDRELS.

' APPLICATION FILED OUT. 29, 1907.,

Patented Sept. 29, 1908.

Q 4 SHEETS-SHEET 3.

A BLANGKE; SEMI-AUTOMATIC BEVOLYING LATHE WITH SEVERAL MANDRELS.

APPLICATION r1121) our. 29. 1907.

' Patented Sept. 29, 1908.

4 SHEETSSHEET 4 D ES MARTIN H. -BLA1\IQKE, censuses Use, GERMANY.

To ell whom it may concern."

Be it known that I,MA RTIN acitizen of, the'German Empire, and resident f-of Merseburg, Germany, have invented cer- Mandrels, of-whicht -fication..

, shifting of the revolving head or the nose of I tain new and useful Improvementsin Semi -Automatic Revolving Lathes .with .Several e following a speci- This invention relates to a semi-automatic revolving lathe in which severalmandr'els are soarranged that castings up to aoertain size' of about 700 mm. diameter can be I worked on the lathe v The lathe is'start'e'd by-hand while, when the. work is finishedr,.

the lathe is arrested automatically' :The

number of mandrels depends on the different working phases an object has. to go through, but such ,objects .may, of course, also be worked on a lathe with several mandrels which require fewer working processes. A suitable locking device prevents an arbitrary the mandrel. The head is not'moved as I hitherto by a cam or some similar means, but

by a screw-s to the present invention.

- Figure 1 1s a sidevlew;

lookingin the-direction of the arrow 8 Fig.

5 i's a cross section on the line C-D, 133%}, I

looking in the direction of the arrow 9 '6' shows the tool. head in front -view-and shows the frame of the driving ear of the, head in throughout the several views.

cross section on the line F,'Fig'. 2; and- Fig. 7' shows-a system of wheelsof the'revolvinghead.

Similar numerals refer to similar parts he construction of. he semi-automatic revolving'lathe is asfollows: The revolving head, which is provided with six mandrels 10, consists of two journal disks 11 (Fig. 2).

which are connected by a bush 12 aridare journaled in the part 130i the frame. The

revolving head is turned by means of ascrewspindle 14, which is driven by a-belt; pulley 15. In order to secure the revolving head in e its different positions the head is provided with. recesses 16 (shown in Fig. 5 'in' dotted lines), into which enters the bolt 18 in the oscillating lever-17 which bolt can be shifted in the part 13 ofthe frame The leverv U Specification of Letters Patent.

Application med Qctober 29,1907. sem no. 399,767.

H. BLANOKE', I

pindle, which produces a reliable forced motion. r j. Y

The drawing shows one embodiment of a semi-automatic revolving lathe, according;

, Fig.2 is a tudinal section; Fig. 3 is a top view; Fig. 4 is a cross section on the line AB,'Fig. 2,-

SEMII-AUTOMATIO 'nnvonvrne LATHE wrrrrsnvnnnn msnnnnns.

Patent-a Sept. 29, 1908.

which pivoted on the pin 19, also forms the disenga ing lever for the coupling sleeve 21',

the position shown in Fig. 5 by a spring 22 and is retained this position by one-arm of, a double armed lever 24 pivoted at-28,." To the other armjof the lever 24 is attached a weight 25, the arm Being, s pported by a rail 26"having an inclined surfa e.- The rail 26 is secured to the tool'head-37 to move there- 'with. When the tool head reaches a prederail raisesone endof the-lever 24'and moves the opposite end of the lever out of'e'ngagement ;with" th'e lever'17. ,The bolt 18 can then be withdrawn from the recess 16 by causes the .lower end of the lever 17 to shift spindle 14 to the shaft 20-. 2

29' directly. In the bush 12 arenoscillatmgly journaled-as many coupling levers 34 as there are mandrels. Each of these coupli is under the action of as ring 35 whic tends to hold thelever 34 in th it connects the couplin sleeve 32 with the 'a: (Fig. 4) thecoupling lever 34 is shiftedby the s a order to rovide the. work-piece with a thread.

38, which isheld by a s ring in its uppermost position and is drawn ownwards bya wedge 40,- when the coupling lever is to .be released to again' couple the mandrel with the wheel tool can be turned out of the work-piece.

ment of the return movement of the tool ,head 37. The wedge 40 is mounted on the rail 26 andoan be adjustedthereon.

termined position, the'inclined surface of the levers e position in which nting guide, 36 (shown in dotted lines in Fig. 3 and also shown'in Figs. 1, 2'and 4) in such a manner that the coupling sleeve] [appertaining to the cou 'ling lever is coupled L with the wheel 30, whic causes the mandrel to turn to'the right. This:is neeessaryin OFFICE.

by whic the screw spindle14 is coupled with the driving shaft 20.- The lever 17 .ls held in' means of the handle, 56 (see Fig; 5). This 'the coupling sleeve 21 to couple the screwa wheel 31. Y .The'mandre s "therefore all turn to-the left. Between position 2 and position a he end of the slanting guide-36'i's formed by a vertically shiftable'shding piece 31 to rotate the'same to theleft, so. that the This-reversing takesplace at the commence- 110.

-. I The frame 13, as will be seen from Fi s. 1,

3 and 4, is further provided with agui e 41, theobjeet of which is to-stop the mandrel in osition y by bringing the res ective coup-' inglever, 34 into the 'interme iate position, in which the coupling sleeve 32 is out of engagementwith both of the wheels 30 and 31.

This is necessary for replacing the finished pieeeby an unwrou ht one.

The head 37 can e'shift'ed in the'frame like a sliding carriage. It is moved by means of ascrew spindle 42 which is driven by a chain gear 43 through a counter shaft-44, which is driven by the shaft 45. The rail 26 is connectedfwith thetool head. to move therewith. On the shaft 45 are 'journaled several gears for different speeds, which can'be coupled Figs. 1 and 6.).

alternatel .with' theshaft 45 by means of coupling s eeves 46, 47. The coupling sleeves are'moved by levers 48, 49 which are drawn by springs 50 towards one side and are held by detent pins 51 inacertainposition.

' levers 48, 49 can be shifted by a projection 58 or 55 providedon the sliding-carriage. '1 Fig. 8 shows the wall 37 which is also seen 7 to the right of Fig. 6 and is hanging down- Wards and provided'with two slots in which the projections. 53, 54, 55 and 58 can be adjusted. The projections 55, 58 are formed by bent pieces of metal or bent screwbolts which'ca'n be fixed in the lower slot while the projections 53,- '54 are oscillating on bolts which can be fixed in the upper slot and are provided at their upper end-with a slanting surface, which passes below the free end of the lever or levers 5'2. The lower end of each projection 53, 54 rests, on the other hand,

- againsta projection 53* and 54*, which can ,lowsz. If the mandrel at y isprovided with v the work-piece and'th'e latter has been ad- 'be fixed in the lower slot. projections 53, 54 cantherefore, when the slidinglcarriage with the tool moves backwards, move out of theway of the respective switch lever 52,- while during the effective movement the projections 53*, 54 prevent a a lateral yielding.

. The action of the revolving lathe'is as foljusted, an ifthe tool head 37 is in-its end position, in which the rail 26 has raised the lever 24, the handle 56 is pulled. The bolt 18 is thereby withdrawn from the recess 16 and the screw 14 is coupled with the shaft 20.

The revolving head turns until the bolt 18' drops. into the'next recess 16, whereby the screw 14 is again-uncoupled from the shaft 20. If this has been done the lever 48 is moved to the left, in which position it is held by a detent .bolt 51, so that the coupling 46 Each ofthe two is eonnected with the driving gear 57, whereby a rapid advance of the-tool head is produced. At the moment the tools are to come in contact with the work-pieces, the

rejection 53 raises the lever 52, so that the bolt 51 againreleases the lever 48, and the latter under the action of the spring then connects the coupling 46 with the ear 59. Thefeed motion proceeds now slowly until the work-piece is fmished- At the end of the feed motion, which can be regulated at will, the lever 48 is brought by the projection 55 into the intermediate position and the feed device is thereby disconnected. But at the same time the detent of the lever 49 is released by' the projection 54 and this lever is therefore moved to the right byits spring, so that the coupling sleeve 47 eomes'into contact with the gear 60 and a slow return movement of the tool head takes place. As soon as the tools have left the work-pieces, the lever49 can'be moved to the left by hand, so that the coupling sleeve 47 engages the gear 61 and a rapidreturn movement of the tool headis effected. .In the end position of the tool head, the lever 49 is brought into the intermediate position by the projection 58 and the device for the return movement is disconnected. From the foregoing it will be understood that the coupling lever 34 is shifted by the uide 36 during the first part of the forwar movement of the tool head 37. When the revolvinghead reaches the position in which the coupling lever abuts'against the sliding piece 38 thebolt 18 drops into a recess 16 to lock the revolving head a ainst ro-.

- tation and the coupli'ng lever is he d in the shifted position by the sliding piece 38du'ring the further advancing movement of the tool head, thus causing the mandrel to turn to the right. When'the tool head reaches its foremost position ,the wedge 40 draws the sliding piece 38 downwardly out of cnga ement with the coupling lever thus permitting the sprin 35 to return the couplin lever toits norma position. While the tool head returns the mandrel therefore turns to the left to cause the tool to be turned out of the work-piece. Suitable detents may be provided tocause the levers 48, 49 to remain in the intermediate position. At each movement of the revolving head the work-piece is brought into contact with another tool and, as already mentioned, in the position (I), Fig. 4, threads can be cut. .If it is desired'to work with a foreand after-cutter, a guide similar to the guide 36 may be provided at z.

Having thus described my invention, what I claim as new therein and desire to secure by Letters Patent is':

1. In a semi-automatic revolving lathe, the combination with the frame, the slidably mounted tool head, 'the revolving head and the spindles rotatably mounted in the revolving head, of a driving shaft common to 130 all the spindles la of loose gear Wheels on-each spindle, mounted within the revolving head-andhaving connection with the driving shaft whereby. they are rotated in opposite directions by the shaft, a coupling on each spindle for coupling either of said gear wheels to its spindle, aspring normally holding the coupling in a. position in which it couples one of the gear wheels to the spindle, a shifting lever for each coupling extending outside of the revolving head, an

inclined guide fixed on the frame exterior to the revolving head and adapted to engage said shifting levers to cause the "shifting levers to shift the couplings into engagement with the other of said gear Wheels, said guide having its end movable out,of the path of movement of the shifting levers, and

.' means connected to the tool head to move therewith and adapted to shift the movable end of the guide to permit the spring to return the coupling to its normal position.

2. In a semi-automatic revolving lathe, the combination with the frame, the slidably mounted tool head, the revolving head and .the spindles rotatably mounted'in the revolving head, of a'driving' shaft common to all of the spindles, a pair of loose gear Wheels on each spindle, mountedwithin therevolv:

ing head and having connection with the driving shaft whereby they are rotated in opposite directions by the'shaft, a coupling on each spindle for coupling. either ofsaid gear wheels to itsspindle, aspring normally holding the coupling m a position in whic it couples one of the gear wheels to the spindle, a shifting lever for each coupling extending outside of the revolving head, an

October, 1907.

inclined guide fixed on the frame exterior to the revolving head and adapted to engage said shifting levers to cause the shifting levers to shift the couplings into engagement with the other of said gear wheels, a vertically movable slide normally forming the end of said guide, a spring for holding t slide in its normal osition, and a track connected to the tool head to move therewith and adapted to shift said slide out of the'path of movement of the shifting levers to permit said first-named spring to return the coupling to its normal position.

3. In a semi-automatic revolving lathe, the combination with the frame, the slidably mounted tool head, the revolving head and the spindles rotatably mounted in the revolving head, ofa driving shaft, a driving member for the revolving head, means for couplingthe driving member to the driving shaft,

MARTIN H. BLANCKE. In presence of two witnesses HENRY HASPER,

WOLDEMAR, HAUPT. 

